1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/*
* TPM Lightweight Command Library.
*
* A low-level library for interfacing to TPM hardware or an emulator.
*/
#ifndef TPM_LITE_TLCL_H_
#define TPM_LITE_TLCL_H_
#include <stdint.h>
#include <types.h>
#include "tss_constants.h"
/*****************************************************************************/
/* Functions implemented in tlcl.c */
/**
* Call this first. Returns 0 if success, nonzero if error.
*/
uint32_t tlcl_lib_init(void);
/**
* Perform a raw TPM request/response transaction.
*/
uint32_t tlcl_send_receive(const uint8_t *request, uint8_t *response,
int max_length);
/* Commands */
/**
* Send a TPM_Startup(ST_CLEAR). The TPM error code is returned (0 for
* success).
*/
uint32_t tlcl_startup(void);
/**
* Resume by sending a TPM_Startup(ST_STATE). The TPM error code is returned
* (0 for success).
*/
uint32_t tlcl_resume(void);
/**
* Run the self test.
*
* Note---this is synchronous. To run this in parallel with other firmware,
* use ContinueSelfTest(). The TPM error code is returned.
*/
uint32_t tlcl_self_test_full(void);
/**
* Run the self test in the background.
*/
uint32_t tlcl_continue_self_test(void);
#if IS_ENABLED(CONFIG_TPM)
/**
* Define a space with permission [perm]. [index] is the index for the space,
* [size] the usable data size. The TPM error code is returned.
*/
uint32_t tlcl_define_space(uint32_t index, uint32_t perm, uint32_t size);
#elif IS_ENABLED(CONFIG_TPM2)
/*
* This enum allows to communicate firmware privilege levels to the TPM layer,
* which can map them into its own attributes.
*/
enum privilege_level {
high_privilege = 1,
low_privilege
};
/*
* Define a TPM space. Privilege level describes who can modify the space
* (high_privilege - the RO code only, low_privilege - ether RO or RW. The
* privilege level needs to be dropped below low_privilege before starting the
* kernel.
*/
uint32_t tlcl_define_space(uint32_t space_index,
enum privilege_level priv_level, size_t space_size);
#endif
/**
* Write [length] bytes of [data] to space at [index]. The TPM error code is
* returned.
*/
uint32_t tlcl_write(uint32_t index, const void *data, uint32_t length);
/**
* Read [length] bytes from space at [index] into [data]. The TPM error code
* is returned.
*/
uint32_t tlcl_read(uint32_t index, void *data, uint32_t length);
/**
* Assert physical presence in software. The TPM error code is returned.
*/
uint32_t tlcl_assert_physical_presence(void);
/**
* Enable the physical presence command. The TPM error code is returned.
*/
uint32_t tlcl_physical_presence_cmd_enable(void);
/**
* Finalize the physical presence settings: sofware PP is enabled, hardware PP
* is disabled, and the lifetime lock is set. The TPM error code is returned.
*/
uint32_t tlcl_finalize_physical_presence(void);
/**
* Set the nvLocked bit. The TPM error code is returned.
*/
uint32_t tlcl_set_nv_locked(void);
/**
* Issue a ForceClear. The TPM error code is returned.
*/
uint32_t tlcl_force_clear(void);
/**
* Issue a PhysicalEnable. The TPM error code is returned.
*/
uint32_t tlcl_set_enable(void);
/**
* Issue a SetDeactivated. Pass 0 to activate. Returns result code.
*/
uint32_t tlcl_set_deactivated(uint8_t flag);
/**
* Get flags of interest. Pointers for flags you aren't interested in may
* be NULL. The TPM error code is returned.
*/
uint32_t tlcl_get_flags(uint8_t *disable, uint8_t *deactivated,
uint8_t *nvlocked);
/**
* Set the bGlobalLock flag, which only a reboot can clear. The TPM error
* code is returned.
*/
uint32_t tlcl_set_global_lock(void);
/**
* Perform a TPM_Extend.
*/
uint32_t tlcl_extend(int pcr_num, const uint8_t *in_digest,
uint8_t *out_digest);
/**
* Get the entire set of permanent flags.
*/
uint32_t tlcl_get_permanent_flags(TPM_PERMANENT_FLAGS *pflags);
#endif /* TPM_LITE_TLCL_H_ */
|
